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Vinony

chalcedony

noun

  1. microcrystalline varieties of silica, may contain moganite as well
L317897 on Wikidata ↗

Wiktionary

Pronunciation: /kælˈsɛd.ə.ni/ / /ˈkæl.səˌdoʊ.ni/

noun

Etymology: Borrowed from Latin chalcēdōnius, from Ancient Greek χαλκηδόνιος (khalkēdónios), from Ancient Greek χαλκηδών (khalkēdṓn), cognate to Arabic كَرْكَنْد (karkand).

  1. A form of fine-grained quartz that is nearly transparent or has a milky translucence; it fractures conchoidally.

    “Although there are dozens of different types of gems, among the best known and most important are […] . (Common gem materials not addressed in this article include amber, amethyst, chalcedony, garnet, lazurite, malachite, opals, peridot, rhodonite, spinel, tourmaline, turquoise and zircon.)”